SHEET /m/histidine · PubChem CID 6274 · CAS 71-00-1 · REV 2026.07
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Histidine
from sourceC6H9N3O2 · 155.15 g/mol
L-His · L-Histidin
What is Histidine?
An essential amino acid and the direct source of histamine, the molecule behind allergic itching and stomach acid release. from source
CategoryBody
LeaderboardsBiggest
Fig. 1 · 2D structure RDKit
SMILES
C1=C(NC=N1)C[C@@H](C(=O)O)NWhere you'll find it
Your own body makes this one. It is not an ingredient you buy. See the rest of the body group.
Toxicity & hazards
WarningIrritantH302, H315, H319, H332from source
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Where Histidine leads
Relatedcomputed
Carnosine55% similarBoth carry a carboxylic acid and an amine group.Histamine44% similarBoth carry an amine group.Phenylalanine43% similarBoth carry a carboxylic acid and an amine group.Tyrosine41% similarBoth carry a carboxylic acid and an amine group.Tryptophan40% similarBoth carry a carboxylic acid and an amine group.L-DOPA38% similarBoth carry a carboxylic acid and an amine group.